Chair.



W. M. BAILEY.

CHAIR.

APPLICATION FILED FEB.29, 1912.

1,067,961. I Patented July 22. 1913.

WITNESSES IN VEN TOR. flax/21277.1 MW.

W iZMW A TT RNE Y.

WILLIAM M. BAILEY, OF WYANDOTTE, MICHIGAN.

CHAIR.

Specification of Letters Patent.

Patented. July 22, 1913.

Application filed February 29, 1912. Serial No. 680,606.

To all whom it may concern Be it known that I, WILLIAM M. BAILEY, a citizen of the United States, residing at WVyandotte, in the county of lVayne and State of Michigan, have invented certain new and useful Improvements in Chairs, of which the following is a specification.

This invention relates to chairs and more especially to stools, and it has for one of its objects the provision of a spring-supported seat so that the present stool is particularly adapted for use by the operators of elevators, street-cars, and in fact in any place where the persons occupying the seat is eX- posed to vibrations or ars.

The invention has, furthermore, for its object the improved construction of the resilient seatsupporting device, as will be hereinafter described and particularly defined in the claim.

The invention has been clearly illustrated in the accompanying drawings, in' which similar characters denote similar parts, and in which Figure 1 is a fractional side View of a stool embodying my invention. Fig. 2 is a horizontal section on line 2-2 of Fig. 1. Fig. 3 is a perspective view of the central member whereby the seat is maintained in proper and vertically-moving position.

Referring to the drawings, 10 denotes the legs of a stool which are connected at the upper ends by a spider 11, each of the sev eral arms of which may be firmly secured to said legs in any convenient manner, as for instance by screws 12. The spider has a central aperture adapted to receive a barrel 13 through which a post 14 (attached to the under side of the seat 15) may move vertically, as guided by rollers 16. 17 which are journaled on studs 18, 19 held in ears 20 21 which are formed on the opposite ends of the barrel 18, respectively. A flange 22 preferably integral with the barrel 13 is removably attached to the spider 11.

In the present instance I employ a plurality of rollers 16, or 17, in each end so that the post 14 will be maintained in free moving condition, and, in order to avoid interference in placing the pivot studs 18, 19, the barrel is cut as shown at 23.

Thebarrel consists substantially of a tubular casting cored out in its central portion 24, so that in reality the post 14 contacts only with the rollers above mentioned.

Secured to the lower end of the post 14, is a plate 25 to which are attached the lower ends of springs 26 the upper ends of which are secured to bolts 27 having nuts 28, whereby the tension of said springs may be varied to a limited extent, it being understood that normally the plate 25 brings up against the under side of the lower endof the barrel 13.

From the foregoing it will be seen that by the use 'of my improved device, jars or vibrations are practically neutralized and that therefore an easy and comfortable seat will be provided.

Changes may be made in the particular construction, and in the organization of the cooperative members of my improved device, without departing from the spirit of the invention.

I claim The combination with a stationary top support plate, legs supporting the same, a barrel rigidly secured thereto centrally and having a central bore, and sets of rollers carried by both ends of said barrel respectively, and projecting into the bore thereof, of a seat, a post secured thereto and guided within the barrel-bore by said rollers, a bottom plate secured to the lower end of said post below said barrel, a series of springs between the top and bottom plates and secured to both of said plates for normally pulling said bottom plate toward the support plate, and

means for variably tensioning each spring individually.

In testimony whereof I aflix my signature in presence of two witnesses.

WVILLIAM M. BAILEY. Witnesses:

H. l). MACDONALD, Bnssm Cox.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

